Spanning tree configuration task lists

Before configuring a spanning tree, complete the following tasks:

• Determine the spanning tree protocol to be used (STP, RSTP, PVST, or MSTP).

• Plan the device roles (the root bridge or leaf node).

When you configure spanning tree protocols, follow these restrictions and guidelines:

• Configurations made in system view take effect globally. Configurations made in Ethernet interface view or WLAN mesh interface view take effect only on the interface. Configurations made in Layer 2 aggregate interface view take effect only on the aggregate interface. Configurations made on an aggregation member port can take effect only after the port is removed from the aggregation group.

• After you enable a spanning tree protocol on a Layer 2 aggregate interface, the system performs spanning tree calculation on the Layer 2 aggregate interface. It does not perform spanning tree calculation on the aggregation member ports. The spanning tree protocol enable state and forwarding state of each selected member port is consistent with those of the corresponding Layer 2 aggregate interface.

• The member ports of an aggregation group do not participate in spanning tree calculation. However, the ports still reserve their spanning tree configurations for participating in spanning tree calculation after leaving the aggregation group.